Press for operating upon sheet material



July 27 1926.

A. BREDENBERG PRESS FOR OPERATING UPON SHEET MATERIAL Filed Oct. 29, 1924 5 Sheets-Shget 1 INVENTOR ATWEMW 8) K wm m +l A TTOHIVEYJ.

July 27 1926.

Filed 0012. 29, 1924 5 Sheets-Sheet 2 July 27 1926. 1,593,565

A. BREDENBERG PRESS FOR OPERATING UPON SHEET MATERIAL Filed Oct. 29, 1924 5 Sheets-Sheet 5 Sheets-Sheet 4 July 27 1926.

A.' BREDENBERG PRESS FOR OPERATING UPON SHEET MATERIAL Filed Oct. 29, 1924- July 27,1925. 1,593,565

A. BREDENBERG PRESS FOR OPERATING UPON SHEET MATERIAL Filed Occ.- 29, 19,24 5 Sheets-Sheet 5 iaqa lllll/E/VTOI? 5 Br 5 4 e s M' a Patented July 27,1926.

UNITED STAT S PATENT OFFICE.

ALFRED nnnnnnnnnc, or'cHAmrLAm, NEW yonmnssrenon or ONE-HALF To run .SHERIDAN IRON wonxs AND ONE-HALF TQ r] w. a c. B. snnnrnan' COMPANY,

BOTH CORIORATIONS 0F YORK.

rnnss ron OPERATING UroN sHnnrmA'rnnmL.

Application filed October 29, 1924. Serial No. 746,689.

terial to other operations. The invention is more particularly concerne with presses for these purposes which embody a stationary head or member, a movable head or member, and power mechanism for operat ing the latter, and the invention conslsts of certain improvements directed to the means for automatically feeding the sheet material between each pressing operation of the press; to means for indicating the degree of pressure to which the material is subjected and for adjusting said pressure, and to other features, which improvements will be fully set forth in the specification to follow, and the novel features of which will be outlined in the appended claims.

In the accompanying drawings Fig. 1 is a side elevation'of a press having my invention embodied therein.

Fig. 1 is an elevation on an enlarged scale of a detail.

Fig. 1" is a vertical sectional elevation through the same on the line 1"1 of Fig. 1

Fig. 2 is a front elevation of the press:

with certain parts omitted.-

Fig. 3 is a side elevation, as viewed in the direction of the full line arrow in Fig. 1, of the feeding mechanism for the sheet material.

Fig. 4 is a similar View" of said mechanism looking in the direction of the dotted line arrowin Fig. 1. Fig; 5 is an elevation on an enlarged scale of the feeding. rolls for the sheet material and the operating parts associated therewith.

Fig. 6 is a plan view of the same.

Fig.7 is a. longitudinal section taken on the line 77 of'Fi-g. 6.

Fig. 8 is a fragmentary plan view of the press showing the application thereto of the pressure indicating mechanism. I

Fig- 9 5a fr nt e e ion of t e same- I full-v described later on.

-- Fig. 9 is .a fragmentary enlarged detailed the indicating mechanism.

Fig. 10is a-front elevation of the indicatsectionshowing the manner of supporting ing dial and pointer and the operating parts. Fig. 11 is a. vertical section through the same on an enlarged scale, on the line 11-11 of Fig.- 10.

Referring to the drawings:

. My improved press comprises av fixed base 01- frame 1, a stationary head '2' overlying said base, and a. movable head Spower operated as will be presently described to move vertically to and from the stationary head,

the said stationary head being provided on its underside with a flat surface 2 and .the

movable head'being provided on its upper side with a similar surface 3*, between which surfaces the material is pressed in the operation of the machine.

.The stationary head, in accordance with one feature of my lnvention, comprlses a lower main head portion 4, and two upper cap portions 5, between which portions are interposed springs 6 for. the purpose presently to be described, the said main portion 4 being supported on shoulders 7 on rods 8 fixed to and rising from the base frame and extending loosely through the head portion 4. The cappoltions 5 overlie the opposite ends'of the head portion 4 and the rods 8 extend loosely through the cap ortions, which latter are confined on the ro s by. means of nuts 9 screwed on the ends of the i-rods and bearing on the upper sides of the cap portions. Bods or stems 10 project upwardly from the main head portion 4 through the springs 6 thereon and extend loosely through the cap portions 5, and have nuts 11 screwed on their upper ends which bear against the top of the cap portions, for the purpose more The vertically movable'head- 3 ends in suitable fixed guides 12 sustamed by the rods 8, and it is moved to and from the.

slides at its bearings in the base frame. These cams engage rollers on a horizontal'rod 16 guided vertically at its ends in guides on the base frame, and to gle links 17. are pivoted at their inner ends to said rod and extend upwardly therefrom and have their outer ends pivoted to the lower links of toggle links 18, which latter are pivoted respectively to the base frame and to the movable head at the As a result of the arends of the latter. rangement described, when the cams are rotated, toggle links 17 will be alternately extended and folded and will correspondingly extend and fold the toggle links 18, with the result that the movable head will be forced towards the stationary head with powerful pressure in performing the pressing operation on the material, and will be retracted therefrom in releasing the material for the feed of the latter.

The cam shaft 14 receives its motion ,through intermediate gearing from a drive pulley 19 on one end of a drive shaft 20 journaledin the base frame, and having fixed to ception of the specific form of the stationary head, may be of the usual and ordinaryconstruction wellknown in this art, and this construction, except in so far as hereinafter indicated, forms no part of the present invention.-

One feature of my invention as before stated resides in the mechanism for automatically feeding the sheet material between the stationary and movable heads, and in carrying out this feature of the invention a bracket 27 is fixed to the base frame at the front of the same, and a similar bracket 28 is fixed to said base frame at .the rear. On the front bracket 27 a supply roll 29 is rotatably mounted and has wound on it the wardly and around a sheet material 29 to beoperated on, which material is led between the stationary and movable heads and is wound upon a rewind roll 30 mounted for rotation on the rear bracket 28. From the supply roll 29, the sheet material. passes over a guide roller 31 journaled in brackets 32 fixed to the upper ends of gulderods 33 fixed to and extendln upwardly from the front bracket 27, an

from this roller the material passes downide roller 34 journaled in slides 35 mova 1e up and down on -65 the rods 33, and from the roller 34 the materialaijaj'sses upwardly and over a guide roller 36 journaled in the outer ends of brackets 37 projecting forwardly from the machine frame at about the level of the lower face of the stationary head. From the roller 36 the material passes horizontally rearwardly between'the pressing faces of the two heads after passing over a uide roller 38 journaled in the inner en s of the brackets 37, and beyond the presser member it passes over aguide roller 39 journaled in brackets 40 projecting rearwardly from the machine frame, the material thusv guided by the three rollers 36, 38 and 39 traveling in astraight horizontal path in a plane substantially coincident to the plane of the meeting faces of the two pressure heads. From the roller 39 the material passes downwardly beneath and around a guide roller 41 journaled in slides 42 movable up and down on rods 43 fixed to and extending upwardly from the rear bracket 28, the material from said roller 41 passing upwardly over and around a guide roller 44 'journaled in brackets 45 fixed to the'upper ends of the rods 43, whence the material passes downwardly and is wound on the rewind roll 30.

A horizontal shaft 35 is journaled in the slides 35, and pinions 35 are fixed to said shaft and engage rack teeth 35 on the rods 33, whereby the two slides are caused to move up and down on the rods in unison and at equal speeds, and will thereby maintain the parallelism of the rollers 31 and 34. Similarly a horizontal shaft 42 is journaled in the two slides 42 and has pinions 42 fixed to it which mesh'with rack teeth 42 on the rods 43, by which arrangement the parallelism of the rollers 41' and 44, in the up and down movements of the slides, will be main- 'tained.

The sheet material guided as above described from the supply roll 29 to the rewind roll 30, is positively advanced periodically between each pressing operation, so that fresh portions of the material will be brought in position between the pressing heads to be acted on thereby. In the present instance this feed of the material is effected by an upper feed or drawv roller 46 and a lower feed or draw roller 47, which rollers are journaled one over the other on the machine frame at a point in rear of the presser heads and just forwardly of the guide roller 39, and in position to receive between them the horizontal stretch of the sheet material in ,its assage between the heads; The lower roller has a pinion 50 fixed to it which engages a gear ring 51 mounted loosely on a clutch rm 52 which in turn ism'ounted loosely on a s aft 53 sustained by the machine frame. The clutch ringl is provided in its peripheral surface wit a number of open pockets in each of which is meunted a clutch roller 54 adapted when he mg 1 moved in one direction to the gear ring 51 and to thereby drive the same and adapted when moved in the opposite direction to disengage the gear ring and move relatively thereto. The hub of the clutch ring 52 has fixed to it a pinion" 55 which is engaged by a vertieal'reciprocating rack 56 guided in the machine frame and stationary head, and to this rack the upper end of a hnk 57 1s plvoted and has its lower.

" end pivoted as at 58 to the rear end of a.

horizontal vibrating lever 59"which extends forwardly above the cam shaft and'is pivoted at its far end as at 60 to the machine frame at the front. The' lever 59 carries a roller 61 acted on'by a cam 62 fixed to the cam shaft 14 which cam, in each rotationof the shaft, will rock the lever 59' upwardly and thereby move the rack5 6 upwardly and rotate the drawing rolls and feed the material a predetermined distance forward.

The cam 62 and partsoperated thereby areso related to the cams 13 operating the movable presser head, that the rack bar 56 will be moved upwardly and will operate the feed rollers to advance the material, when the movable presser head descends after each pressing operation, and on the ascent of the presser head in the next pressing operation,

the rack bar will be moved downwardly, anddue to the provision of the one-way clutch between thegear ring 51 and'the pinion 55,

such downward movement will not afiect the feed rolls.- Therefore the material will be fed forward a predetermined distance between each pressing operation, and'remain stationary during pressing.

In order that the pivotal connection of i the link 57 with the lever 59 maybe adjust- .able longitudinally of the lever for the purpose of varying the throw of the rack .56,-

the pivot 58 of the link is formed on a block 58'which is recessed in its'fac'e to fit and slide along the lever, setscrews 58 being carried by the block and engaging the edge of the lever to hold the block in'its difi'erent adjusted positions thereon. The blockis adjusted lengthwise of the lever by -means of an adjusting screw. 58 which is screwed througha lug 58 depending from the end of the lever and through a lug 58 depending from the block, the rotation of this screw in opposite directions shifting the block to the right or left as the case may be and correspondingly effecting the adjustment of the pivotal connection of the link 57 with the lever, longitudinally of the latter.

On the forward feed of the material by the feed rollers a tension will be created on the web at the supply side of the machine,"

and aslack will be created in the web on the rewindside of the machine. Such tension will raise slides 35 on their guide rods, and the upward yielding of these will prevent any jerk on the heavy roll of material, it bematerial in the stretch between the guide rollers 31 and 34 to furnish the requisite degree of-feedof the material by the feed rollers onthe ascentof the slides 35 as described.

When the forward feed of the material ceases, the slides will slowly descend by their weigl t from their raised position, and will unwin d from the supply roll sufiicient material for the next feeding operation. The roller 34; movable .u and down .with the slides on the "guide rots 33, constitutes in effect a yielding means which when it moves in one direction, downwardly in the present .case,'-will act as hereinbefore described to unwind a length of material from the supply roll, and which is adapted to be operated and moved upwardly by the pull of the material thereon in the operation of the feeding mechanism.

hen the slides 35 reach a certain point in their descent, ,the shaft 35 will engage the inner end of a lever 63 pivoted as at ($4: on the bracket 27 and having its forward end connected by a link 65 with a. friction brake .66 acting on av brake drum 67 on the journal of the supply roll, and the descending shaft by'depressing said lever will force the brake into. engagement with the brake drum and will thereby stop the further unwinding movement of the roll, the stretch oi" the material between the guide rollers 31 and 34:, when the slides are in their lowermost position, being sufficient as before mentioned, to furnish the requisite amount of material for the next feeding operation.

The descent of the slides 35 is cushioned by buffer collars-68 sliding on the rods 33 and restlng on springs 69 encirclingjsald rodsandsupported on the bracket 27.

The journal I of the supply roll 29 is mounted in its bearings so that it can be shifted endwise in order to properly center the roll with reference to the .presser heads and to correct any misalignment that might.

in the operation of the machine take place.

This journal is locked for the time being,

in position by means of a segmental rack 67 pivoted to a. bracket 67 b sustained by the journal hearing, which segmental rack is engaged by a peripheral rack 67 formed on the end of the journal, the segmental rack being releasably locked in position by-means of a, locking'device 67 The segmental rack has fixed to it an operating lever 67 by means of which the rack may be swung on its axis and by engagement with the rack- &

The slack in the material created on the rewind side of the machine b the forward feed as described, is taken up y t 19 descent of the slides 42 on their guide rods 4:3, and when the slides reach a certain pointiri their descent, they will act automatically, as will now be described, to start the rotation of the rewind roll to wind up the pressed material, and when the material has all been wound, the rewind roll will be automatically brought to rest. I

The rewind roll has fixed to its journal a pinion 70 with which meshes a pinion 71 fixed to a shaft 72 mounted for rotation in bearings sustained by the bracket 28. Near its outer end the shaft has mounted for rotation thereon a sprocket wheel 7 3 which driven constantly from the ,shaft let by a sprocket chain 7 4: passing over said sprocket wheel and over a sprocket wheel 7 5on shaft 14. The sprocket wheel 73 is adaptedto be clutched to the shaft 7 2 by a clutch mechan1sm 76 operated by a clutch collar. 77 splined to the shaft 72. The clutch collar is engaged by a izontal fore-and-aft extending shaft 79 mounted in a beari g sustained by the bracket 28, and extending forwardly, and an arm 80 is fixed to the end of the shaft 79 v and extends inwardly laterally of the machine, and to the endof this arm the lower end of a chain or cable 81 is fastened, which has its upper end coupled to a horizontal rod 81" connected with the slides 42. The

form and relation of the parts described is such that the clutch will be thrown into action to start the rotation of the rewinding roll when the slides 42 descend in the creation of the slack inthe web on the feed of the same, such descent of the slides causing the rod 81, to engage a pin 82 projecting forwardly from the end of the arm 80 and by such engagement shifting the clutch fork and connecting the clutch. As the rewind roll rotates and winds the finished material on it, the slides will be pulled up on their rods, and when they reach their uppermost position they will pull up on the chain and will shift lever 80 and thereby disconnect thtlel clutchand stop the motion of the rewind ro L It is seen therefore that the rewind roll is automatically started to take up the slack in the web caused by the forward feed of the material, and when said slack has all been wound on the roll, the rotation of the latter will be automatically arrested. Retrograde movement of the rewind roll is prevented by means of a ratchet dog 83 engaging a ratchel wheel 84 on the journal of the rewind roll. The roller 41 movable up and down with the slides 42 on the guide rods 43, constitutes in effect a yielding means which when moved in one direction, downwardly in the present instance, will act as thereon of the feed rollers.

fork 78 depending from a hordescribed to take up the slack in the pressed material created by the feed of the material, and which is adapted to be operated and elevated when the rewind roller is rotated to wind up said slack.

By the mechanism above described for feeding the sheet material, no greater strain is imposedon the feed rollers than is necessa ry-- to raise the slides 35 and the parts carried thereby. The weight of thesevparts is comparatively 'inconsiderable, and as the rolls of the material weigh many hundreds of pounds on account of the great lengths handled, it would not be possible, by reason of the correspondingly great inertia of the roll, to start the same by the direct pull The feed rollers have only the work imposed on them of lifting the slides, and the slides by their gradual and slow descent on the termination of-the feed by the feed rollers, will act to start the rotation'of the supply roll gradu ally land-easily, and will thus overcome the inertia without jerk or undue strain.

In operating on sheet material in presses of this type, more particularly in embossing leather or so-calledartificial leather, it is desirable to know the exact pressure applied per square inch, and it is desirable to have the pressure flexible sothat if the material varies in thickness, the pressure will be approximately thesame for different thicknesses. To meet these conditions the special form of stationary presser head before referred to is adopted, said head comprising, as hereinbefore described, a lower main por tion or head proper 4, upper cap portions 5', and 'two groups of interpose springs 6. These springs are placed under initial tension by compressin them between the two portions of the hea so that if the aggregate resistance represented by the springs is overcome in the upward movement of the movable head 3 in the pressing operation on the material, the lower portion 4 of the stationary head will yield upwardly relative to the cap ortions. the parts is utilized to operate an indicating mechanism- 85 shown in Figs. 2, and 8 to 11, which mechanism is constructed and applied in the following manner.

A horizontal frame or cross bar 86 is set in between the two cap portions 5 and is fastened loosely thereto as by the bolts 87, and a horizontal tube 88 is fixed at its rear end to said bar and extends forwardly therefrom to the front of the press where it has fixed to it a dial casing 89. Mounted to oscillate in this tube is a shaft 90 having fixed to its rear end an arm 91 provided with a segment surface 92. A. steel band 93 is connected at one end to said arm at the .end of the segment surface and is connected at its opposite end to the hub 94.- of a lever 95 journaled on a fore-and-aft axis on the Such relative movement ofcrossbar 86. At itsfree end the lever 95 tionary presser head, so that any upward movement of the'head 4 relative to the cap portions 5 and the cross bar 86, when the resistance of the springs is overcome, will rock lever 95-. and through the medium of. band 93. and arm 91, will correspondingly rock shaft 90. The movement of. shaft 90 is other end of the. belt is fixed to the free lower end of an arm 103 whose upper'end is fixed to the forward end of the shaft 90 within the dial casing.

' The form, construction and relation of the foregoing parts' is such that when the springs 6 are relaxed and free from tension the pointerwill be on the zero mark as shown in Fig, .10, and when the springs are set under the tension necessary for the maximum pressure to which the material is to be subjected, the pointer will register with the particular graduation on the dial indicating such pressure. When under such setting of the parts, the pressure is exceeded to the slightest degree, the pointer will be moved 'and will indicate such excess. In this Way, the operator will be apprizedat all times of the exact pressure to which the material is being subjected in the operation of the press and will be immediately warned when such pressure is exceeded. The mechanism therefore affords means for preventing the material from being subjected to a greater degree of pressure than is desired, and it prevents injurious strains and stresses j on the operating parts of the mechanism.

In tensioning the springs for the desired resistance, the parts are manipulated as follows. The nuts 11 are screwed down into contact with the caps 5. The press is then turned over and the movable head caused to push the lower portion'4 of the stationary head upwards, thereby forcing the caps 5 against the nuts 9, compressing the springs a slight amount, andllfting the portion 4 slightly off its supporting shoulders 7- on the rods 8. While the portion 4 of the sta-' tiona ry head is at its highest p0int, the nuts 11 which had been lifted out of contact with the caps on the upward movement of theportion 4, are screwed down again into contact with the caps, .thereby holding the springs under compression. When the movable head descends, the lower portion 4 of the stationary head will follow and seat again on the shoulders 7 on the upright rods 8, and these operations are repeated until the springs are placed under the tension necessary for the maximum pressure to which the material is to be subjected.

As before stated the cross bar 86 carrying theindicating mechanism is set in between the cap portions 5 loosely by means of the bolts 87, the purpose being to enable the indicator to properly respond to the relative movement ofthe parts and indicate the true pressure, although the material under pressure may be thicker at one side thanat the other. The looseness referred to is a. looseness in the longitudinal direction of the bar 86 and is bestshown in Figs. 9 and 9 where it will be seen that av slight play is permitted 1 between the head of the bolts 87 and the inner adjacent faces of the cap portions 5. These bolts fit snugly both in the holes in the cross bar and in the cap portions so that there is no relative vertical movement of the parts permitted but only a relative movement longitudinally of the bar.

The machine is controlled in its-operation, that is it is started and stopped by means of two-hand levers 105 and 106 respectively at the front and rear of the machine 'as best seen in Fig. 1. At their lower ends these levers are fixed .to the opposite ends pf a fore-and-aft extending rock shaft 107 mounted in bearings 108 and 109 supported respectively by the front and rear brackets 27 and 28. At a point in line with the axis of the drive shaft 20 the rock shaft 107 has fixed to it' an upwardly extending arm 110 pivoted to one end'of a link 111 which extends below shaft 20 and has its opposite end pivoted to a lever 112 pivotally supported at its lower end by the base frame of the machine and forked at itsupper end to engage and operate the clutch collar 22 before referred to. Due to this construction and arrangement of the parts, the pinion 22 on the drive shaft may be clutched to or unclutched therefrom so as to connect the drive shaft with or disconnect the same from the operating mechanism of the machine.

It willlbe understood that the principles of this invention cover numerous variations of embodiment and various applications and uses. When sheet material is referred to this may include a mere carrying sheet or web on which may be positioned independent or smallleather or other pieces to be pressed. An endless web may be usedto support the material to be pressed. The

pressure indicating mechanism may be employed with any type of feed mechanism. ince many matters of operation, arrangement, combination structure and detail may tended to limit the invention to such matters except so far as specified in the appended claims.

Having thus described my invention, what I claim is:

1. In a press of the character described, the combination of presser heads operable upon the material fed between them, a rotatably mounted supply roll adapted to hold a supply ofthe material, yielding actuating means acting on the stretch of material between the supply roll and presser heads and operable to unwind lengths of material from the supply roll, and feeding mechanism acting on the material after it leaves the presser heads and functioning both to Operate the yielding actuating means and to advance the unwound material between the presser heads.

2. In a press of the character described, the combination of presser heads 0 erable periodically on the sheet material ed between them, a rotatably mounted roll adapted to hold a supply of the sheet material, feeding means acting on the material to advance the same between the presser heads in the intervals betweenthe pressing operations and thereby create'slack in the pressed material, yielding actuating means acting on the stretch of material between the feed-. ing means and supply roll and operating to unwind a supply of material from the roll, a rewind roll ada ted to receive the pressed material, and a yielding actuating member acting on the stretch of material between the feeding means and rewind roll and operatto take up the slack in said material,

a said actuating member being operated by the rotation of the rewind roll.

3. In a press of the character described, the combination of presser heads 0 erable periodically on the sheet material ed'between them, a rotatably mounted roll adapt ed to hold a supply of the sheet material, feeding means acting on the material to advance the-same periodically between the presser heads in the intervals between the pressing operations, a vertically movable gravitating member acting on the stretch of material between the feeding means and supply roll and operating by its descent to unwind a supply of material from the roll, and thereby createslack in the pressed material, a rewind roll adapted to receive the pressed material, and a-vertically movable gravitating member acting on the stretch of material between the feeding means and rewind roll and operating by its descent to created by the feed'of the same.

4. Ina press of the character described, the combination of presser heads operable periodically on the material fed between them, a rotatably mounted rewindroll to receive the pressed material from the presser heads, means for feeding the material between the heads and thereby creating slack in the material between the presser heads and rewind roll, and a yielding actuating member between the presser heads and rewind roll and acting to take up said slack, said member being operated by the rotation of the rewind roll.

, 5. In a press of the character described, the combination of presser heads operable periodically on the material fed between them, means for feeding the material between the heads in the intervals between the pressing operations, and thereby creating slack in the pressed material, a rotatably mounted rewind roll to receive the pressed material, and a vertically movable member acting on the pressed material and adapted by its descent to take up the slack created by the feed of the material.

6. In a press of the character described, the combination of presser heads operable periodically on the material fed between them, means for feeding the material between the heads in the intervals between the pressing operations,a rotatably mounted roll to receive the pressed material, power means for operating the same, and means governed by the feed of the material for controlling the action of the power means on said roll.

7. In a press of the character described, the combination of a stationar resser head, a presser head movable to an fiom the stationary head, ower means for operating the movable hea a rotatably mounted roll adapted to hold a supply of sheet material to be pressed, a rotatably mounted rewind roll in position to receive the pressed material, means for rotating said rewind roll, front and rear guiding rolls in position to direct the material in a straight line between the presser heads, feeding means acting on the material to advance fresh portions of the same to the action of the presser heads, a yielding actuating roller acting on the stretch of material between the supply roll and front guide roller and adapted by the feed of the material to be moved bodily in one direction, and operating by its movement in the opposite direction to unwind a fresh supply of the material from the supply roll, and a yielding actuating roller acting on the stretch of material between the rear guide roller and 'therewind roll and adapted when the rewind roll winds up the pressed material, to be moved bodily in one direction, and operating when moved in the opposite direction to take up the slack in the material caused by the feed of the same.

8. In a press of the character described, the combination of a stationary head, a

(head movable to and from the stationary head, power means for operating the movable head, a rotatably mounted roll adapted to hold a supply of sheet, material to be pressed, a rotatably mounted rewind roll in position to receive the pressed material, means for rotating said'rewind roll, front and rear guiding rolls in position to direct the material in a straight line between the presser heads, feeding means acting on the material toadvance fresh portions of the on the stretch of material between the rear guide roller and the rewind roll. and adapted to be elevated when the rewind roll is rotated to wind up the pressed material, and operating by its descent to take up the slack in the material caused by the feed ofthe same.

9. In a press of the character described, the combination of presser heads operable periodically on the material fed between them, means for feeding the material between the heads in the intervals between the pressing operations and thereby creating slack in the pressed material, a rotatably mounted rewind roll to receive the pressed material, power means for operating said .roll, a clutch controlling the operation of said power means on the roll, a yielding member acting on the pressed material to take up said slack, and means governed by the movement of said yielding member for controlling the clutch.

10. In a press'of the character described,

the combination of presser heads operable on the material fed between them, a rotatiably mounted supply roll adapted to hold a supply of said-material, means for unwinding a length of the material from the roll, means for feeding said length of material between the presser heads, and means controlled by the unwinding means for applying a braking action to the said roll.

11. In a press of the character described, the combination of presser heads operable on the material fed between them, a rotary roll adapted to hold a supply of the material, feeding means acting on the material to pull the same forwardly between the presser heads in theintervals between the.

pressing operations, and thereby put the material under tension between the feeding means and supply roll, and a rectilinearly movable yielding member acting. on the stretch of materialbetween the supply roll the combination of presser heads operable on the material fed between them, a rotatably mounted roll adapted to hold a supply of the material, feeding means acting on the material to advance the same between the presser heads in the intervals between the pressing operations, upright-guides between the supply roll and presser heads formed with racks,- slides movable up and down on said guides, pinions journaled in the slides andlengaging the racks, and a guide roller .journaled in the slides and engaging the stretch of material between the supply roll and,presser heads and operating by its descent to unwind lengths of material from the supply roll, said guide roller being adapted to be elevated by the pull of the'material thereon in its feeding action.

13. In a press of the character described,

the combination of presser heads operable on the material fed between them, a rotatably mounted supply roll for holding a supply of the material, feeding means acting on the ma-terlal to advance the same between the presser heads In the mtervals between the pressing operations, upright fixed guides between the supplyv roll and presser heads, a fixed material guiding member on said guides over which the material passes from the supply roll, and a member movable up material passes to the presser heads, said movable member acting in its descent to unwind lengths of material from the supply roll, and being adapted to be elevated by the pull of the material thereon in its feed ing action.

14. In a press of the character described, the combination of presser heads operable on the material fed between them, means for holding a, supply of the material, a ro-- tatably mounted rewind roll to receive the pressed material from the presser heads, means for feeding the material between the presser heads and thereby creating slack in. the pressed material. upright fixed guides between the presser heads and rewind roll, and a member movable freely up and down on said guides and bearing on the stretch of material between the presser heads and rewind roll, said member in its downward and down on said guides under which the movement acting-to take up the slack creatterial from the presser heads, means for feeding the material between the presser heads and' thereby creating slack in the pressed material, power meansfor rotating the rewind roll, a clutch mechanism con- .of material between the presser trolling theoperation of the power means on the rewind roll, a member movable in opposite directions and engaging the stretch heads and rewind roll, and operating when moved in one direction to take up the slack created by the feed of the material, and adapted to be moved in the opposite direction by the wind ing action of the rewind roll, and means operated by the movement of said member in taking up. the slack for throwing the clutch into action.

16. In a press of the character described, the combination of presser heads operable on the material fed between them, means for holding asupply of the material, a rotary rewind roll to receive the pressed material from the presser heads, means for feeding the material between the presser heads and thereby creating slack in the pressed material, power means for rotating the rewind roll, a clutch mechanism controlling the operation of the power means on the rewind roll, a roll movable freely up and down between the presser heads and rewind roll and bearing on the stretch of material between said parts, said roll acting in its-descentito take up the slack created by the feed of the material, and adapted to be moved upwardly by the rotation of the rewind roll, and means acting when the said movable roll reaches -the end of its downward move-' ment to throw the clutch into action and thereby start the rotation of the rewind roll.

17. In a press of the character described, the combination of a stationary presser head comprising an upper fixed portion, a lower movable portion, and a series of interposed springs, a movable presser head, means for operating the latter, and a pressure indicating mechanism adapted to be operated by the movement of the lower portion of the stationary head when the resistance of. the springs is overcome by the pressure of the movable head.

18. In a press of the character described,

the combination of a stationary'presser head comprising upper fixed cap portions, a lower movable portion, and two series of springs interposed between the lower-portion and cap portions respectively, a movable presser head, means for operating the, latter, a cross member extending between and connected to said cap portions.- and a pressure indicating mechanism sustained by said cross member and comprising a movable part adapted to be operated by the movement of the lower portion of the stationary head when the resistance of the springs is overcome by the.

pressureof the movable head.

19/ In a press of the character described, the I combination of a stationary presser head comprising an upper fixed portion, a

a series of interlower movable portion,

for adjusting the posed springs, andmeans 'movable portion, stems connected with the movable portion and extending through the fixed portion, nuts applied to said stems and adapted to engage the fixed portion, and a series of springs interposed between said portions, a movable presser head, means for operating the latter, and a pressure 'indicating mechanism adapted to be operated by the movement of the lower portion of the stationaryhead when the resistance of the springs is overcome by the pressure of the movable head. v

21. In a press of the character described, the combination of a base frame, posts rising therefrom .and provided with sustaining shoulders, a stationary presser headcomprising an upper fixed portion mounted on said posts, a lower movable portion also mounted on saidposts and adapted to rest upon the sustaining shoulders, and a series of springs interposed between said two portions of the stationary head, a movable presser head, means for operating the latter, and a pressure indicating mechanism adapted to be operated by the movement of the lower portion of the stationary head when the resistance of the springs 15 overcome'by the operation of the movable head. 22. In a press of the character described, the combination of a base frame, vertical rods rising therefrom and provided with sustaining shoulders, a stationary presser ,tween the fixed and mova le portions of the stationary head, a movable presser head, means for. operating the same, and a pressure indicating mechanism adapted to be operated by the movement of the lower portion of the stationary head when the resistance of the springs is overcome by the movable head.

23. In a press of the character described, the combination of presser heads movable relatively to press the material between them,

one of said heads consisting of sec in the operation of the press.

tions movablerelatively to each other with 'inte rposed yielding means resisting .24. A .press as in claim 23 andwhorein 10 the sectional presser'head comprises spaced alpart platens, one directly contacting with t e material during ressing, the other fixedstationarily, and t e interposed yielding means consisting of numerous compressed springs arranged to press apart sa1d sec- 15 tlon aerosstheir length and breadth, and a stop for the yielding platen.

In testimony whereof, I have afixed my signature hereto.

v ALFRED BBEDENBERG. 

